The EQ901 USB is also a high performance digital pre-amplifier (DAC) intended to drive high
quality power amplifiers or integrated amplifiers/receivers. Analog, USB and TOSLINK digital
audio inputs are provided.
When used in the digital input mode, the music stream is maintained in the digital domain all
the way through the 901 equalization process. This is the purest and highest fidelity way to
drive your 901s.
1. Features
● USB / TOSLINK Streaming Digital to Analog Converter (DAC) with built-in equalization
curves for the 901 Series V/VI
● Precise BOSE 901 equalization is performed digitally before the DAC in an Analog
Device 400 MHz SHARC DSP processor with 24 bit resolution
● The four BOSE 901 tone modes (EQ curves) are available on all four outputs. Two
identical stereo pairs outputs are available, allowing for dual active stereo systems (two
stereo power amps) or the addition of an active subwoofer(s)
● Remote selectable inputs:
1. Analog
2. TOSLINK
3. USB
● Remote selectable tonal characteristics settings:
1. Normal mode
2. Enhanced mode
3. Warm mode
4. Low frequency reduction mode
● Remote volume control with 0.5 dB resolution and mute
● Ultra low distortion 2.0 Vrms output driver stage
● Selectable input sensitivity of 2.0 Vrms or 4.0 Vrms
2. What’s Included
● EQ901 USB equalizer for your BOSE 901 Series I/II, III/IV or V/VI (series selected at
order)
● Four precision engineered tone adjustment equalization curves
● Two identical stereo pairs outputs are available allowing for dual active stereo systems
(two stereo power amps) or the addition of an active subwoofer(s)
● Deer Creek Audio USB drive with PC USB audio driver
Page 2
EQ901 USB User Guide - Rev. 05242022 deercreekaudio.com
